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公开(公告)号：US20220397749A1
公开(公告)日：2022-12-15
申请号：US17821231
申请日：2022-08-22
Inventor： Takuya Imaoka , Qinghua ZHAO , Katsu YAMADA
Abstract: The present disclosure is directed to an optical system internally having an intermediate imaging position that is conjugated to a magnification conjugate point on a magnification side and a reduction conjugate point on a reduction side, respectively, the optical system comprising: a magnification optical system positioned on the magnification side with respect to the intermediate imaging position; and a relay optical system positioned on the reduction side with respect to the intermediate imaging position; the relay optical system including: a first lens group positioned closest to the magnification side; two lens groups positioned on the reduction side with respect to the first lens group; and a negative lens group interposed between the two lens groups, wherein during zooming the negative lens is fixed, while the two lens groups are displaced.
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公开(公告)号：US20220276475A1
公开(公告)日：2022-09-01
申请号：US17747323
申请日：2022-05-18
Inventor： Takuya IMAOKA , Qinghua ZHAO , Katsu YAMADA
Abstract: The present disclosure is directed to an optical system internally having an intermediate imaging position that is conjugate to magnification and reduction conjugate points, respectively, the optical system including: a magnification optical system having a plurality of lens elements, positioned on the magnification side with respect to the intermediate imaging position; and a relay optical system having a plurality of lens elements, positioned on the reduction side with respect to the intermediate imaging position, wherein there are a plurality of air distances among the lens elements, the magnification optical system includes a magnification optical system front group positioned on the magnification side with respect to the longest air distance in the magnification optical system and a magnification optical system rear group positioned on the reduction side with respect to the longest air distance, and the optical system satisfies the conditions (1) and (2).
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公开(公告)号：US20230384571A1
公开(公告)日：2023-11-30
申请号：US18232936
申请日：2023-08-11
Inventor： Qinghua ZHAO , Katsu YAMADA , Takuya IMAOKA
CPC classification number: G02B15/1461 , G02B13/0095 , G02B13/16
Abstract: The present disclosure is directed to an optical system internally having an intermediate imaging position that is conjugate with both of a magnification conjugate point on a magnification side and a reduction conjugate point on reduction side, including: a magnification optical system including a plurality of lens elements and positioned on the magnification side with respect to the intermediate imaging position; and a relay optical system including a plurality of lens elements and positioned on the reduction side with respect to the intermediate imaging position, wherein the relay optical system includes a plurality of moving lens groups which are independently movable in an optical axis direction during zooming, and wherein the reduction side-closest moving lens group that is positioned closest to the reduction side among the plurality of moving lens groups has a negative refractive power.
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公开(公告)号：US20220283412A1
公开(公告)日：2022-09-08
申请号：US17748636
申请日：2022-05-19
Inventor： Qinghua ZHAO , Takuya IMAOKA , Katsu YAMADA
Abstract: The present disclosure is directed to an optical system internally having an intermediate imaging position that is conjugate to a magnification conjugate point on a magnification side and a reduction conjugate point on a reduction side, respectively, the optical system including: a magnification optical system having a plurality of lens elements, positioned on the magnification side with respect to the intermediate imaging position; and a relay optical system having a plurality of lens elements, positioned on the reduction side with respect to the intermediate imaging position, wherein a first lens element located closest to the magnification side among the plurality of lens elements in magnification optical system is an aspherical lens having a negative power, the optical system satisfies the conditions (1) to (3).
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Patent Agency Ranking
公开(公告)号：US20210356693A1
公开(公告)日：2021-11-18
申请号：US17387028
申请日：2021-07-28
Inventor： Takuya IMAOKA , Qinghua ZHAO
Abstract: The present embodiment discloses an interchangeable lens that can be detachably attached to an apparatus body having an image forming surface on which an image is formed, and the interchangeable lens has a magnification conjugate point on a magnification side and a reduction conjugate point on a reduction side. The interchangeable lens includes a focus lens group that can move along an optical axis to adjust a focus at the magnification conjugate point and a flange back distance correction lens group that can move along the optical axis to correct an error in a flange back distance of the interchangeable lens with respect to the image forming surface.
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公开(公告)号：US20210341715A1
公开(公告)日：2021-11-04
申请号：US17377776
申请日：2021-07-16
Inventor： Qinghua ZHAO , Takuya IMAOKA
Abstract: The present disclosure is directed to an optical system internally having an intermediate imaging position that is conjugated to a magnification conjugate point on a magnification side and a reduction conjugate point on a reduction side, respectively, the optical system including: a magnification optical system having A (A is an integer of three or more) pieces of lens elements, positioned on the magnification side with respect to the intermediate imaging position; and a relay optical system having B (B is an integer of two or more) pieces of lens elements, positioned on the reduction side with respect to the intermediate imaging position. A first lens group composed of β pieces (β is one or more and less than B) of lens elements positioned first from the magnification side in the relay optical system has a negative power.
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公开(公告)号：US20210333526A1
公开(公告)日：2021-10-28
申请号：US17370196
申请日：2021-07-08
Inventor： Takuya IMAOKA , Qinghua ZHAO
Abstract: The present disclosure is directed to an optical system internally having an intermediate imaging position that is conjugated to a magnification conjugate point on a magnification side and a reduction conjugate point on a reduction side, respectively, the optical system including: a magnification optical system having a plurality of lens elements, positioned on the magnification side with respect to the intermediate imaging position; and a relay optical system having a plurality of lens elements, positioned on the reduction side with respect to the intermediate imaging position. The magnification optical system has a first lens element and a second lens element in this order from the magnification side, and the second lens element has a positive power. The optical system satisfies the following condition (1): 23
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公开(公告)号：US20210096335A1
公开(公告)日：2021-04-01
申请号：US17119545
申请日：2020-12-11
Inventor： Qinghua ZHAO , Yoshio MATSUMURA
Abstract: An imaging optical system having an image circle formed on an imaging element includes: a plurality of lens elements arranged from an object side to an image plane side, and a diaphragm arranged between the plurality of lens elements, wherein the plurality of lens elements includes a freeform lens having a freeform surface that is asymmetrical with respect to a long side direction and a short side direction which cross with each other with a diameter of the image circle in the long side direction being larger than a diameter of the image circle in the short side direction, wherein at least two freeform lenses are located on the object side of the diaphragm, wherein the imaging optical system satisfies a condition based on a summation for freeform surfaces of freeform lenses located on the object side of the diaphragm.
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公开(公告)号：US20160274342A1
公开(公告)日：2016-09-22
申请号：US15070375
申请日：2016-03-15
Inventor： Qinghua ZHAO , Yoshiyuki HISATOMI , Takuya IMAOKA
IPC: G02B15/173 , G02B27/00
CPC classification number: G02B15/173 , G02B27/0025
Abstract: A zoom lens system according to the present disclosure includes, in order from an object side to an image plane side, a first lens group having positive optical power; a second lens group having negative optical power; a third lens group having positive optical power; and a subsequent lens group including a fourth lens group, a fifth lens group, and a sixth lens group. The first lens group comprises, in order from the object side, a first lens element having negative optical power; a second lens element having positive optical power; a third lens element having positive optical power; and a fourth lens element having positive optical power. The fifth lens group in the subsequent lens group has negative optical power. The first lens group is fixed with respect to the image plane in zooming from a wide-end to a tele-end upon image shooting.
Abstract translation: 根据本公开的变焦透镜系统包括从物体侧到像面侧的顺序具有正光焦度的第一透镜组; 具有负光焦度的第二透镜组; 具有正光焦度的第三透镜组; 以及包括第四透镜组，第五透镜组和第六透镜组的后续透镜组。 第一透镜组从物体依次包括具有负光焦度的第一透镜元件; 具有正光焦度的第二透镜元件; 具有正光焦度的第三透镜元件; 以及具有正光焦度的第四透镜元件。 后续透镜组中的第五透镜组具有负光焦度。 在图像拍摄时，第一透镜组相对于图像平面被从广角端变焦成远端端。
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